August, 1944 



Ross: Caddis Flies of Illinois 



119 



face of the body, fig. 432; case 

 translucent, evenly tapered and with 

 dorsal side either ringed or fluted 



with raised ridges, fig. 558 



Mayatrichia, p. 160 



Fig. 431. — Neotrichia sp. larva, metanotum. 



Fig. 432. — Mayatrichia ayama larva, meta- 

 notum. 



Fig. 433. — Mayatrichia ayama larva, eighth 

 tergite. 



Fig. 434. — Tascobia palmata larva, tarsal 

 claws. 



Fig. 435. — Ochrotrichia nnio larva, tarsal 

 claws. 



Fig. 436. — Ochrotrichia tarsalis larva, met- 

 anotum. 



Fig. 437. — Hydroptila waubesiana larva, 

 metanotum. 



9. Tarsal claws with long, stout inner 

 tooth, fig. 434; case purselike, ro- 

 bust Tascobia, p. 124 



Tarsal claws without prominent inner 

 tooth, fig. 435; case either purselike 

 or cylindrical 10 



10. Middle and hind legs with tibiae cylin- 

 drical and long, fig. 428; case long, 

 smooth and round in cross sec- 

 tion, tapered at each end and with 



an indented slit at both ends 



Orthotrichia, p. 139 

 Middle and hind legs with tibiae stout 

 and widened at apex, fig. 429; case 

 of purse type 11 



11. Metanotum with a distinct, widened 



ventro-lateral area, fig. 436 



Ochrotrichia, p. 125 



Metanotum without a widened, lateral 

 area, fig. 437 Hydroptila, p. 141 



Aduhs 



1 . Ocelli absent 2 



Ocelli present 4 



2. Front tibiae with an apical spur 



Dibusa, p. 121 



Front tibiae without an apical spur. . 3 



3. Metascutellum almost rectangular, fig. 



445 Orthotrichia, p. 139 



Metascutellum pentagonal to triangu- 

 lar, fig. 446 Hydroptila, p. 141 



4. Metascutellum as wide as scutum, 



short and rectangular, fig. 438. . . . 

 Tascobia, p. 124 



444 



Hy 



Fig. 438 

 Fig. 439 

 Fig. 440 

 Fig. 441 

 Fig. 442 

 Fig. 443 

 Fig. 444 

 Fig. 445 

 Fig. 446 



445 



446 



droptilidae. Thorax 



. — Tascobia brustia. 

 . — Leucotrichia pictipes. 

 . — Metrichia nigritta. 

 . — Ochrotrichia tarsalis. 

 . — Agraylea multipunctata. 



— Oxyethira pallida. 



— Ithytrichia clavata. 



— Orthotrichia americana. 



— Hydroptila hamata. 



